University of Georgia, Ningbo University - Medical School, University of Georgia - Department of Epidemiology and Biostatistics, University of Georgia - Department of Epidemiology and Biostatistics, Stanford University - Division of Infectious Diseases and Geographic Medicine, Zhejiang Provincial Center for Disease Control and Prevention, University of Georgia - Department of Epidemiology and Biostatistics, Jiaxing Municipal Center for Disease Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Jiaxing Municipal Center for Disease Control and Prevention and Zhejiang Provincial Center for Disease Control and Prevention